Water-flushing device



Nov. 20 1923. 1,474,472

D. E. GULICK TER FLUSHING DEVICE Filed Nov. 1, 1918 Patented Nov. 20,1923.

wA'rEn-rLUsnmG DEVICE.

Application filed November To all whom it may concern:

Be it known that 1, DAVID E. GULIOK, a

citizen of the United States, residing atj San Francisco, in'the countyof San Francisco and State of California, have inv nted certain new anduseful Improvements in ater-Flushing Devices, of which the following isa specification:

This invention relates to water flushing devices, and pertainsespecially to improve Inentstherein. a

This application embodies certain features shown and described in myapplication for a flushing valve, filed March 11, 1918, Serial No.231,011. and only such features asare not claimed in said applicationwill be claimed herein.

The object of this invention is to provide a water flushing device ofsuch novel and peculiar construction and arrangement of parts as toafford advantageous construction and operation to avoid waste ofwater,and to utilizelthe water pressure for operating a motor valve and apiston in unison so that the piston will act as a check in closingmovement of the valve.

. In the accompanying drawings forming part of this application:

Fig. 1 is a central sectional view.

Fig. 2 is a cross section taken on the dotted line A-A, Fig. 1.

Fig. 3 is 'a detail sectional elevation of part of the check piston.

The same reference characters denote the same parts in the drawings.

In carrying out my invention I employ a main body or casing 1, having awater sup ply inlet 2, and outlet 3, and an initiating relief valve 4having a stem member 5 working through a water passage 6 in the'valveseat 7. The stem member 5 cooperates with a handle 8 for operatingthe'valve 4. The body 1 has an annular inner web 9 having a centralopening for a motor or main valve 10, which, together withv a diaphragm20, divides th body into two chambers 11 and 12. which are connected bya byp-ass 13, controlled by a pin 14. for permitting water to passtherethrough. The web may be'omitted without affecting the operation.water passage 15 connects the upper chamber-11 with the relief valvechamber 16, which is connected with the lower chamber 12 by a passage 17through which a stem member '18 of the relief valve 4 works forpreventingthis passage becoming choked or 1, 1918. Serial No. 260,690.

-.clogged. Thearelief valve controls. com

munication between said passages 15, 17 and I 6. and the latter passageis connected with the outlet 3 by a water passag 19. The motor'valve 10is suspended by means of the flexible diaphragm 20 which allows themotor valve to close on'a seat 21 within the body 1, and above theoutlet 3 and the discharge end of the passage 19, and which permits themotor to move. upwardly in opening movement. overhangsthe seat 21 so asto be'raiSed by water pressure in the chamber 12, and said valve has achamber 22 for deposit of dirt or other foreign matter as may becontained in the water. The motor is attached'to a rod 23 extendingthrough an opening 1 in the top wall of, the body 1, and is providedwith a guide tail 24 Working through the valve seat 21.

The motor valve 10 A cylindrical casing 25 is secured upon the 7 body 1by a coupling ring 26 so that the'top wall of the body forms a partition2, and this casing is divided into two variable chambers 27 and 28 bymeans of a movablev division embodying a specially constructed checkvalve piston which comprises'a main screw threaded member 29 having anannular flange 30, nut member 34 having an annular flange 32, a gasket33 clamped between. the inner face of the nut and the flange 30" and acup-shaped gasket 34 held against the gasket 33 by a spiral spring 35seated on the flange 32 so as to' force the overhanging part of thegaskets 33 and 34 outwardly with the piston lowered. and to permit saidoverhanging part tocontract or recede with the piston raised, andthereby allow water to pass from the upper chamber 27 around'the pistonand into the lower chamber 28. The pistonhas afscrew 36 extendingthcrethrough, and the screw is provided with a water duct 37 tofacilitate the operation-of the piston. The

piston is attached to the upper end of the rod 23 so as to offset thepiston from the top of the body 1 which forms the bottom 2 or base ofthe chamber 28, and thereby pre- 7 vents the piston from engaging saidbottom when the motor or main valve is seated. In order to insure theseating of the main valve, or motor underlow water pressure, or nopressure at all, a spiral spring 38 may intervene the top of the chamber27 and the piston 29.

In operation, the initiating valve 4 being opened relieves the pressureHithe chamber the. duct 37 into the chamber 27, thereby the chamber 11',and through the rod opening 1e; into the chamber 28, thence throughforcing the piston downwardly and closing the main valves 7 Obviously,the piston acts as acheck be cause it can-move downwardly only as fastas the water is forced from the chamber 28 7 through or by thepistonvinto the chamber ber'll.

27. Itwill be observed that the water in the-chambers 27-,andf28 isiorced'from one side to the other of the piston, and any loss of leakagefrom these chambers will be re-. placed by. leakage into them from thecham- It willfalso be observed that an equal pressure in all the,chambers is maintained during the operation of the device; that is tosay, the? pressure in any one cham her is equal to the pressure in anyother or" the chambers. The by-pass 13 may be dispensed with, as it isonly provided as a precaution; in the event of the passage leadingto thechamber 11 becoming obstructed 5 Or closed. The spring '38 may also bedispensed with, for the reason that it is'not necessary when there isthe usual or reasonable water pressure for operating the piston.

I do not wish to be understood as limiting my invention in size, shapeand material,

to the exact'shape or construction of the various parts, or to theapplication thereof,

and, while'I have shown-and described the device as for upper andlowerland top and bottom parts, the device may be given differentpositions in practical application, but

: by Letters Patent is reserve the right to use equivalents of the-partjs'shownand to "make such changes and variations in the manufactureof the device i scope of the apas maycome within the pended claims.

.{Having thus described my invention, what I claimfas new and desiretosecure Til. A flushing device including a casing with an 'inlet and avdischarge outlet, two

movable divisions and 'avtixed partition .di-

viding the casing intofour subcham'bers, each -subchamber connected tothe adjoining sub- ;chamber by normally open. fluid passage -means,* amain valve to control the discharge outlet,'a water passage connectingone of @theintermediate' subchambers with the out- .-let;-;='a--valvetocontinl said water passage, and-means for renewinga portion of thecontrolling fluid during each flushing operation. 5 I

'the two last mentioned members in thechambereone of said chambershaving a maininlet, and a main discharge outlet, a valve to control themain discharge outlet, a movable division in the other main chamber andmeans "for the admission of liquid to said chamber without thesimultaneous discharge of liquid therefrom during the closing movementsof the main valve.

3. A flushing device comprising a casing having two main chambers,normally open passage means connectingsaid chambers, a

movable divisionfin each main chamber di- .viding'said chambers intosubchambers and.

relatively small normally open passage means connecting each subchambertothe 'adJommg chamber.

4. In a water flushing devicea main body,

flan annular inner web member having a central opening and dividingthebodyinto' a pair of chambers, a flexible diaphragmin one of the chambersof said pair, a motor valve suspended by the diaphragm and workingthrough said opening, a passage from the other of said chamber, apassage into, the diaphragm chamber, a valve-chamher at the intersectionof said passages, a

-: discharge passage connected with thezvalve chamber, and-an inwardlyopening initiat- -ing valve in the valve chamber and having a stemworking through one of said passages.

5. A water flushing device comprising a main valve, a main chamber withinlet and an outlet, a partition dividing the main chamber into an inletchamber and a piston chamber, open passage means connecting ;these .twochambers, a flexible diaphragm in one of the two chambers, a by-passconnect ing one of; the two chambers with the outlet of the mainchamber, a valvecontrolling the by-pass, a piston in the otherof the twochambers, and means connecting the'piston with the flexible diaphragm,said piston per- -mitting free movement of the diaphragm in onedirection and'checking the movement 7 "thereof inthe'opposite direction.

- '6. In a water flushing device, a flexible diaphragm clamped at itsperiphery by an -:a nnular disk: recessed on its under side to form abacking for thefiexible'diaphragm (and ;;its central clamping: member,passage means forming communication between the chambers above and belowthe flexible diap'hra'gm, a stem attached to'an inwardly openinginitiating valve and in the aforesaid passage-means to prevent-cloggingof said passage, a piston chamber mounted on the annular'disk and havinga, water passage thereinto through the central portion of the disk, apiston working in the piston chamberand expansible means-including anonflexible member, a'flexible member, a cushion member, and threadedmeans for securing piston for engaging the wall of the chamber duringthe movement:of-thepiston in 'one direction and affording passagebetween said Wall and the piston during the movement of the piston inthe opposite direction a main valve suspended by the flexible diaphragmand an annular Web member on the underside of the flexible diaphragm andhaving an opening closely fitting the said main valve to prevent foreignmatter such as sand from coming into contact With and causing a wearingand cutting efi'ect on the 10 said flexible diaphragm.

In witness whereof I hereunto set my 'hand in the presence of twoWitnesses.

DAVID E. GULICK WVitnesses:

V RALPH E. NICHOLAS, FREMONT S. DUNN.

